21012111200102 has 16 divisors (see below), whose sum is σ = 34582202990352. Its totient is φ = 9495751775520.

The previous prime is 21012111200089. The next prime is 21012111200159. The reversal of 21012111200102 is 20100211121012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2760389153 + ... + 2760396764.

It is an arithmetic number, because the mean of its divisors is an integer number (2161387686897).

Almost surely, 2^{21012111200102} is an apocalyptic number.

21012111200102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012111200102 is a deficient number, since it is larger than the sum of its proper divisors (13570091790250).

21012111200102 is a wasteful number, since it uses less digits than its factorization.

21012111200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5520786103.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21012111200102 its reverse (20100211121012), we get a palindrome (41112322321114).

The spelling of 21012111200102 in words is "twenty-one trillion, twelve billion, one hundred eleven million, two hundred thousand, one hundred two".